package com.example.calendar.ui.screens.week

import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Add
import androidx.compose.material.icons.filled.KeyboardArrowLeft
import androidx.compose.material.icons.filled.KeyboardArrowRight
import androidx.compose.material.icons.filled.Today
import androidx.compose.material3.FloatingActionButton
import androidx.compose.material3.Icon
import androidx.compose.material3.IconButton
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.navigation.NavController
import java.time.format.DateTimeFormatter
import java.time.LocalDate

/**
 * Screen for displaying the weekly calendar view
 */
@Composable
fun WeekScreen(navController: NavController) {
    val currentDate = LocalDate.now()
    
    Scaffold(
        floatingActionButton = {
            FloatingActionButton(
                onClick = {
                    // Navigate to the create event screen
                    navController.navigate("event/create")
                }
            ) {
                Icon(
                    imageVector = Icons.Default.Add,
                    contentDescription = "Add Event"
                )
            }
        }
    ) { paddingValues ->
        Column(
            modifier = Modifier
                .fillMaxSize()
                .padding(paddingValues)
                .padding(16.dp)
        ) {
            // Week header with navigation
            WeekHeader(
                weekText = "Week of ${currentDate.format(DateTimeFormatter.ofPattern("MMMM d, yyyy"))}",
                onPreviousWeek = { /* TODO: Implement */ },
                onNextWeek = { /* TODO: Implement */ },
                onToday = { /* TODO: Implement */ }
            )
            
            // Placeholder for week view
            Box(
                contentAlignment = Alignment.Center,
                modifier = Modifier.fillMaxSize()
            ) {
                Text(
                    text = "Week View\nComing Soon",
                    style = MaterialTheme.typography.headlineMedium,
                    textAlign = TextAlign.Center
                )
            }
        }
    }
}

@Composable
fun WeekHeader(
    weekText: String,
    onPreviousWeek: () -> Unit,
    onNextWeek: () -> Unit,
    onToday: () -> Unit
) {
    Column(modifier = Modifier.fillMaxWidth()) {
        androidx.compose.foundation.layout.Row(
            modifier = Modifier.fillMaxWidth(),
            verticalAlignment = Alignment.CenterVertically
        ) {
            Text(
                text = weekText,
                style = MaterialTheme.typography.titleLarge,
                fontWeight = FontWeight.Bold,
                modifier = Modifier.weight(1f)
            )
            
            IconButton(onClick = onPreviousWeek) {
                Icon(
                    imageVector = Icons.Default.KeyboardArrowLeft,
                    contentDescription = "Previous Week"
                )
            }
            
            IconButton(onClick = onToday) {
                Icon(
                    imageVector = Icons.Default.Today,
                    contentDescription = "Today"
                )
            }
            
            IconButton(onClick = onNextWeek) {
                Icon(
                    imageVector = Icons.Default.KeyboardArrowRight,
                    contentDescription = "Next Week"
                )
            }
        }
    }
} 